In PHP 8.4, the type of `PHP_DEBUG` changes from `int` to `bool`.
See [PHP.Watch: PHP 8.4: `PHP_ZTS` and `PHP_DEBUG` constant value type changed from `int` to `bool`](https://php.watch/versions/8.4/PHP_ZTS-PHP_DEBUG-const-type-change).
This changes the constants to `ZEND_DEBUG_BUILD`, which contains the same value but as a `bool` across all PHP versions.
closes#6222
there's no need for the worker specialization here (isShutdown and shutdown are aliased to isJoined and join respectively), and the unstacking is not really desirable either as we previously learned with AsyncPool.
Despite the comments, there doesn't seem to be an obvious reason for these to be copy-pasted. Perhaps there was some legacy reason for this with legacy pthreads.
In fact, it looks likely that quit() will probably be able to be traitified too.
If awakened by spurious wakeup, the thread would immediately exit without doing anything, rendering it useless.
Not sure how it took so long for this to be found...
PHPStan will verify that these matches cover all cases, which guarantees that all cases will be covered.
In addition, if PHPStan is not used, the constructors will immediately bail out when they hit a case that isn't covered.
The only downside is the extra indentation :(
in particular, the information from VerifyLoginTask shouldn't be sent to clients, as it could contain sensitive information.
This change only affects disconnection screens. The server log shows the same amount of information as before (though formatted differently in some cases).
Sync-prepared batches account for the vast majority of outbound packets. Avoiding these useless objects further reduces the overhead of zero-compressed packets, as the creation of these objects is a significant part of the overhead for these cases.
closes#6157
